Rotary casting.



.8. DE LAVAUD.

'ROTARY CASTING. APPLICATION FILED MAYI. IsIs.

Patented Dec. 3, 1918.

IIB]

.Y INI/ENTOR:

` ATTORNEYS.

ROTARY CASTING.

rasante.

Specification of Letters Patent.

Application mea nay 1, 191s. serial ut.` 231,834.

To all whom t may concern:

Be it knownV that l, DIMrrRI SENSAUD Dn I LAvAUn, a citizen of the,United States of ttl dlt

Brazil, and a resident of New York, in the county of New York and'Stateof New York, have invented certain new and useful lmprovements in RotaryCastings, of which the following isa specification.

This invention relates tothe art of casting metal in horizontal rotarymolds, as for instance those'rotated at such high speeds as to utilizecentrifugal force. By such means, as is already' known, cast ironpipes,` sleeves, piston rings and other annular articles may be castrapidly and economically.

The object of-the present invention is to improve the art by providing anovel method of land apparatus for permitting even` an unskilled molderto control the thickness of a casting absolutely 'and with a nicety ofprecision hitherto -thought impossible. .By the thickness of the castingis meant the difference between the inside and outside diametersthereof. Y Of course the outside diameter of the casting is determinedby the inside diameter of the mold. The inside diameter of the casting,and hence its thickness is dependent on the magnitude of the charge ofmolten metal delivered to the mold at each casting operation; but the4attain ment of uniformity in successive charges has been'most dillicult.As previously conttl structed, a complete casting machine of thel rotarytype has comprised, in addition to` the rotating mold, a rotatabletrough which when beyond the mold-'is filled with a charge' of'molten.metal, and then, when the mold and trough are overlapped, is dumped todeliver the molten metal to the mold. lf

.when the trough is set in charge receiving positionl the two sideAedges of the pouring slot are not in the samehorizontal plane, I

less than its maximum tlmes desirable.

as is often accidentally the case, the charge delivered to'the trough,where the filling of the trough to the spill-point, is relied on, willbe 'declent lf the twoside` edges of the pouring slot are in the samehorizontal plane, the trough may not be deliberately lled with adefinitely ascertained lcharge capacity,'fas is some t According to thepresent invention, a deli- @nite :pouring edge o 'the slot is selectedas a spill-index ,tthis edge is first preliminarily adjusted, as bydeubertteiy 'tilting the trough slightly or elevating the edge more orless relative to the axis of rotation of the trough, and the trough isthereafter given a charge of molten metal thejlevel of which bears adenite relation to the horizontal Patenten neeaiui. i

tit

plane containing said edge, preferably such that the level is attainedwhen the metal begins to spill over said edge. Stop means may be andpreferably are provided to predetermine thatthe trough, 4when returnedto charge receiving position, will always be tilted or have such edgeelevated to the proper extent. -Adjusting devices are also preferablyprovided, which may be included as parts of said stop means, whereby theextent of tilt or edge elevation of the trough t on each functioning ofthe stop means may preferred practice =of the invention, then,

` not only v may a single type 'of trough be and constructed; dependencebeing placed on the supervisor to ascertain by simple experiment thespill-point of each trough 'at maximum capacity and to set the`adjusting device accordingly. f

The invention will be more clearly underi stood from the followingdescription, when v be determined in advance. According to the taken inconnection with the accompanying drawingjshowing two 4types of apparatusillustrative of the invention.

lIn this drawing,

Figure 1 is 'an-end elevation, showing a trough untiltedin chargereceiving position, `the supporting means in whichthe Vtrou gh isjournaled, and a stop-means including an adjusting device carriedbyssaid supporting A means;

Fig. 2 is. a side elevation of the parts of Fis?. l;

Fig. 3 isa view simila'rto Fig. l, but showing the adjusting devlce setto hold `the trough tilted in charge receiving position;

Fig-4 is a side'elevation of amodilied form of apparatus, wherein thestop-means includes an adjustingdevice 'carried by the roe lime

trough and itselfl having an edge constituting a variable pouring edgefor the trough,

to be used as a spill-index; and

Fig. 5 is a section on the line 5 5 of Fig. 4.

Referring to the construction shown in Figs. 1, Q and 3, the trough 6 is`rotatable in bearings 7 and 7 carried by a base S.

The trough is provided with a handle 9, and a hollow charge receivinginterior 10 having a pouring slot 11. V,

The center of rotation' of the trough is indicated at 12.

The stop-means comprises a fixed device or stop member 13, securedon theexterior of the trough near its bottom. and an adjusting device or stopmember 14 here constituted as a screw tln'eaded through a boss lthe'opposite side edges of the pouring slot 11 are contained in thesame' horizontal plane and therefore the trough is in the pojsition ofmaximum capacity. A carefully measured charge of molten metal, exactlycorresponding to the charge requiredto cast each of a. series ofarticles of the desired thickness. is delivered to the trough., The stopmember 13 is then readjusted very carefully while the handle 9 iscorrespondingly moved to maintain the two stop members in abutment,until the spillpoint is reached or approached to the desired degree, sayuntil the parts are arranged as shown in Fig. 3. The trough is thenturned over to the molder, and it is his duty merely to return thetrough to the position shown in Fig. 3 each time before deliveringmolten metal thereto, and then to fill the trough until a spill of themetal over the edge 111l occurs or is imminent as just described. ItWill be seen from the construction shown that the melder may move thetrough only in the direction D to dump the trough and only in thedirection It to return the4 trough to charge receiving position. In thepresent case the metal dumped from the trough into the mold is spilledover the same side edge (the side edge 11n of the pouring slot) whichacted `as the` spill-index.

Referring tothe construction shown in Figs. 4 and 5, the trough is ofthe same construction as before, except that opposite the chargereceiving interior of the trough the exterior thereof is provided with aplane-Y suIff-aced boss 16 surrounding a vertical'slot 17 cut throughthe side of the trough land opening at its top into the pouring slot 1l.

approached to the desired degree.

kmember 18. The upper edge 19n of the stop member 19 forms a variablepouring edgefor the trough to be used as a spill-index. The stop member19 is slotted as shown at 19", with the slot taking about the shank of aset-screw 20 threaded into the boss 16, so that the, edge 19a may beadjusted and secured at various distances below the adjacent side edgeof the main pouring .slot of the trough. In order to facilitate suchadjustment and securement, the boss 16 has a vertically elongated ear9.1 vertically offset therefrom to coact with and aline the adjacentedge of stop member 19.

ln operation, the Supervisor first, adjusts the stop member 19 vso thatthe edge 19 thereof is opposite the adjacent side edge of the pouringslot of the trough, seeing to it that the stop members are in abutment,and consequently that the' opposite side edges of the pouring slot ofthe trough are in the same horizontal plane and the trough is in theposition of maximum capacity. A carefully measured charge of moltenmetal. exactly corresponding to the charge required to cast each of aseries of articles of the desired thickness, is delivered to the trough.Stop member 19 is then readjusted very carefully until'the spill pointis reached or- The trough -is then turned overl to the founder, and itis hisv duty merely to returlrthe trough to the position shown in Fig. 5each time before delivering molten metal thereto, and then to fill thetrough until a spill of the metal over the edge 19n occurs or isimlminent. as just described. It will be seen facilitating the same andcoming Within the mventlon, first, a pouring edge of the trough (as theedge 11, Fig. 2, or the edge 19a, Fig..4) is selected as the spill-indexnext the position of said edge is adjusted relative to the axis ofrotation of the trough to set said edge as a spill-index relative to thedesired magnitude of charge, and next the trough is filled so that theliquid level ofthe molten metal therein bears a. definite desatarrelation .to said edge as thus adjusted'and 'positioned, before dumpingthe trough to discharge the charge therein into the mold.

I claim:

1. rllhe method of predetermining the magnitude of the charge of moltenmetal deliverable by a rotatable trough to the rotating mold of a rotarycasting machine, Where the trough is provided with a pouring slot havinga pouring edge adapted to serve as a spill-index relative to apredetermined magnitude of charge, which comprises preliminarilyadjusting `the position of said edge relative to the axis ofrotation ofthe trough to vconstitute said edge as a spillindex relative to [thedesired magnitude of charge, then Iilling the trough so that the liquidlevel of the molten metal therein bears a-deinite relation 4to said edgeas thus positioned, then arranging the ltrough and mold in overlappingrelation, and thendumping the trough to spill the charge out of thetrough into the mold.

2. The method of predetermining the magnitude of the charge of moltenmetal deliverable by a rotatable trough to the rotating mold of a rotarycasting machine, where the trough is provided with a pouring slot havingat least one side edgeA parallel to the'axis of rotation of the trough,which comprises preliminarily adjusting the trough relative to its axisof rotation to set said edge as a spill-index indicative of lthequantity of molten metal which may be accommodated between thehorizontal plane containing said edge and the wall area of the troughinterior below said plane, then filling the trough to the spill point,then arranging the troughand mold in overlapping relation, and thendumping the trough to 4spill the charge out of the .trough into the V 3.The method of predetermining the magnitude of the charge of molten metaldellverable by a rotatable trough to the rotating mold of a rotarycasting machlne,

where the trough is provided with a pouring slot having at leastone'side edge parallel to the axis of rotation of the trough, whichcomprises preliminarily adjusting the trough relative to its axis ofrotation' to set said edge as a spill-index indicative of the quantityof molten metal which may be accommodated between the horizontalplanecontaining saidedge and the wall area of the troughl interior belowsaid plane, then filling the trough so that the liquid level` of themolten metal therein bears adenite relation to 'said-plane, thenarranging the trough and mold in voverlapping relation, and then dumpingthe trough'to spill the charge out of the trough over said edge into themold. p

4. The method of predetermining the magnitude of the charge of moltenmetal deliverable by a rotatable trough to the rotating moldof a rotarycasting machine, where the trough is provided with a pouring slot havingat least one side edge parallel to the taxis of rotation of the trough,which comprises preliminarily tilting the trough to` predeterminedly setsaid edge to act as a spill-index relative to the attainment of achargel by the trough less than the maximum capacity of the trough, then4delivering molten metal to the trough until said spillindex functions,and thereafter dumping the trough to discharge into the mold all themolten metal in the trough.

' 5. ln a rotary casting machine, in combination, a pouring troughf:provided with a pouring slot having a spill-index edge, stop means forpreventing disposition of the trough to arrange said edge to lower thecapacity of the trough for containing molten metal below a predeterminedminimum, and means for rotating the trough about its axis from suchdisposition to dump the 4metal below a pre etermined minimum, and

means for rotating the trough about. its axis to dump the charge in thetrough into the mold over said edge.

7 In a rotaryv casting machine, in combination, aA pourlng, troughprovided with, a pouring s lot having a spill-index edge,supportingmeans for the trough during rotation, co-acting parts carried by thetrough and by said means for preventing disposition of the trough toarrange said edge other than in a predetermined location, and means lll@for variously adjusting the relation of said co-acting parts Vwhereby onarranging the trough in charge receiving positionl said edge is alwayslocated at one of several levels relative to the axis of .rotation ofthe trough. i 8. ln a. rotary casting machine, in combination, a rotarypouring trough, supporting means for the trough, a stop-member carrie bythe trough and having a delinite .location relative to a selectedpouring-edge of the` trou h, and a co-acting stop-member c arried y saidmeans, one ofsaid parts being preliminar-ily adjustable to predeterminethat when the stop-members are in abutting relation said selectedpouring edge constitutes a spill-index to facilitate always filling thetrough tc a predetermined extent.

rit

9. In a rotary casting machine, a construeton as described in elaim h,wherein the stop-member on the trough is txeclly offset-from theexterior" thereof, and the 5 stop-member on -satl means is adjustablefrom or toward the other stop-member thereby to partially tilt thetrough to set the same for aerommmlatng to the verge of spill a chargeof molten metal less than the maximum capacit)- of the trough. 10 Signedat, New York, in the rounty of New York and State of New York this 26thday of April A. D. 1918.

DIMITRI SENSAU D on LAVAUD.

